﻿/************************************************************************

   Extended Silverlight Toolkit

   Copyright (C) 2010-2012 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://extendedsilverlight.codeplex.com/license

   Please purchase a commercial version of this toolkit if you are using
   it in a commercial product. The commercial versions support the project,
   and also include more features for each control, priority support,
   source code, updates, removed watermark, and a proprietary license.

   Visit http://xceed.com and follow @datagrid on Twitter.

  **********************************************************************/

using System.Diagnostics;

#if !SILVERLIGHT
using System.Windows;
#endif

namespace Xceed.Silverlight.Utils
{
  [DebuggerStepThrough]
  internal abstract class WeakEventManager<TSource> : WeakEventManager
  {
    #region Constructor

    protected WeakEventManager()
    {
    }

    #endregion

    protected abstract void StartListening( TSource source );

    protected abstract void StopListening( TSource source );

    protected void AddListenerProtected( TSource source, IWeakEventListener listener )
    {
      base.AddListenerProtected( source, listener );
    }

    protected void RemoveListenerProtected( TSource source, IWeakEventListener listener )
    {
      base.RemoveListenerProtected( source, listener );
    }

    protected sealed override void StartListening( object source )
    {
      this.StartListening( ( TSource )source );
    }

    protected sealed override void StopListening( object source )
    {
      this.StopListening( ( TSource )source );
    }
  }
}
